🚨 GPT-5.6 is already running into major capacity problems

Users are reporting widespread issues across ChatGPT and Codex:

• “Selected model is at capacity” errors • GPT-5.6 missing from the Codex extension in Cursor • GPT-5.6 prompt caching reportedly failing on partial prefixes • Some users unable to switch models • Agent Mode disappearing for affected Plus accounts • Codex limit resets allegedly not restoring full usage

OpenAI has repeatedly reset usage limits since GPT-5.6 launched, but demand may still be overwhelming available capacity.

Has GPT-5.6 been bugging out for you or is it stable?